From 6f5b69ea24985a79ab8656a54a1c051cb3f33631 Mon Sep 17 00:00:00 2001
From: Federico Lucifredi <flucifredi@acm.org>
Date: Mon, 14 Jan 2008 03:46:13 +0000
Subject: deletion now functional, but needs tweaking.

git-svn-id: file:///home/lennart/svn/public/avahi/branches/federico@1710 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe
---
 avahi-core/announce.c  |  2 +-
 avahi-core/rr.h        |  1 +
 avahi-core/wide-area.c | 14 ++++++++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)

(limited to 'avahi-core')

diff --git a/avahi-core/announce.c b/avahi-core/announce.c
index 0e920e8..80789a0 100644
--- a/avahi-core/announce.c
+++ b/avahi-core/announce.c
@@ -521,7 +521,7 @@ void avahi_goodbye_entry(AvahiServer *s, AvahiEntry *e, int send_goodbye, int re
 
             /* tracing message for wide-area pub development */
             printf("--- record of type %d named %s observed at exitpoint\n", e->record->key->type, e->record->key->name);
-            avahi_wide_area_publish(r, "dynamic.endorfine.org", s->wide_area_lookup_engine->next_id++, s->wide_area_lookup_engine->fd_ipv4, AVAHI_WIDEAREA_DELETE);
+            avahi_wide_area_publish(e->record, "dynamic.endorfine.org", s->wide_area_lookup_engine->next_id++, s->wide_area_lookup_engine->fd_ipv4, AVAHI_WIDEAREA_DELETE);
         }
 
     if (remove)
diff --git a/avahi-core/rr.h b/avahi-core/rr.h
index 70b793d..99c7130 100644
--- a/avahi-core/rr.h
+++ b/avahi-core/rr.h
@@ -61,6 +61,7 @@ enum {
 /** DNS record classes, see RFC 1035, in addition to those defined in defs.h */
 enum {
     AVAHI_DNS_CLASS_ANY = 0xFF,         /**< Special query type for requesting all records */
+    AVAHI_DNS_CLASS_NONE = 0xFE,         /**< Special query type for deleting a record */
     AVAHI_DNS_CACHE_FLUSH = 0x8000,     /**< Not really a class but a bit which may be set in response packets, see mDNS spec for more information */
     AVAHI_DNS_UNICAST_RESPONSE = 0x8000 /**< Not really a class but a bit which may be set in query packets, see mDNS spec for more information */
 };
diff --git a/avahi-core/wide-area.c b/avahi-core/wide-area.c
index fc39763..a8602fb 100644
--- a/avahi-core/wide-area.c
+++ b/avahi-core/wide-area.c
@@ -828,6 +828,8 @@ int avahi_wide_area_publish(AvahiRecord *r, const char *zone, uint16_t id, int f
     char globalfield[AVAHI_DOMAIN_NAME_MAX];
     char *backup = NULL;
     char *backupfield = NULL;
+    uint16_t backupclass;
+    uint32_t backupttl;
     char *tmp;
 
     AvahiDnsPacket *p;
@@ -922,6 +924,12 @@ int avahi_wide_area_publish(AvahiRecord *r, const char *zone, uint16_t id, int f
     }
 
     if(action == AVAHI_WIDEAREA_DELETE) { /* deleting pre-existing record */
+        backupclass = r->key->clazz;
+        r->key->clazz = AVAHI_DNS_CLASS_NONE;
+
+        backupttl = r->ttl; /* TODO: fix library limit, support 0 TTL */
+        r->ttl = 0;
+
         result = avahi_dns_packet_append_record(p, r, 0, 0); /* bind max TTL to 0, deletion */
     } else { /* publishing new record */
             if(r->key->type == AVAHI_DNS_TYPE_A) { /* standardize TTLs independent of record for wide-area */
@@ -972,6 +980,7 @@ int avahi_wide_area_publish(AvahiRecord *r, const char *zone, uint16_t id, int f
 
     /* cleanup */
     r->key->name = backup; /* restore original key */
+
     if (backupfield)
       if (r->key->type == AVAHI_DNS_TYPE_SRV) { /* SRV has a different layout than other records in the union */
        r->data.srv.name = backupfield; /* restore field if altered */
@@ -979,5 +988,10 @@ int avahi_wide_area_publish(AvahiRecord *r, const char *zone, uint16_t id, int f
        r->data.ptr.name = backupfield; /* restore field if altered */
       }
 
+    if(action == AVAHI_WIDEAREA_DELETE) { /* restore class if altered */
+        r->key->clazz = backupclass;
+        r->ttl = backupttl;
+    }
+
     return 0;
 }
-- 
cgit